Website Security Audit Tools — 36 options compared (2026)
Website security audit tools fall into a few overlapping camps: dynamic scanners (DAST) that crawl your live site for OWASP Top-10 issues, network/host vulnerability scanners (Nessus-style), continuous web layer monitors that watch your public surface for drift and outages, malware/cleanup services for WordPress and CMS sites, and managed pentest platforms with humans in the loop. Pricing ranges from free open-source (OWASP ZAP, Nuclei, Wazuh, Wordfence) through SMB tiers ($89-$300/mo for Detectify, Probely, Intruder.io, Astra Pentest) up to enterprise contracts ($15K-$100K+/yr for Veracode, Checkmarx, Rapid7). This directory compares them with honest strengths and limitations — no rankings paid for, no marketing fluff. Updated 2026.
Continuous public-web-layer guardian — watches HTTP / size / multi-lang redirects / cyrillic drift / structure every 30 min. Self-hostable from $99 one-time.
Most popular free open-source DAST scanner — active/passive web scanning, intercepting proxy, CI/CD integration.
Industry-standard pentest proxy — free Community for manual work, Pro $449/yr per user, Enterprise from $6,995/yr.
EASM + DAST hybrid — vulnerabilities sourced from a private researcher community, $89-$449/mo published tiers.
Acunetix
paidMature commercial DAST scanner from Invicti — quote-based, generally $4,500+/yr per target tier.
Enterprise DAST + IAST with Proof-Based Scanning — annual contracts, quote-only.
Veracode
paidEnterprise AppSec platform — SAST + DAST + SCA + manual pentest. Public minimum ~$15,000/yr.
Checkmarx One
paidUnified AppSec platform consolidating SAST/SCA/IAST/API/IaC. Quote-based, public minimums ~$30,000/yr.
Developer-first SCA + SAST — Git/IDE/CI integration, generous free tier, paid Team from $25/dev/mo.
Continuous DAST + manual pentest hybrid — published pricing $199-$5,999/yr, popular with SaaS startups.
Online toolkit of 25+ pentest scanners (web, network, recon) — paid plans from $93/mo with unlimited scans.
Continuous external vulnerability scanner aimed at SMBs — published pricing from $113/mo per target group.
API-first DAST scanner with developer ergonomics — published from $59/mo for a single target.
Developer-DAST built on top of ZAP — CI-native, free tier, paid from $49/app/mo.
Rapid7 InsightAppSec
paidEnterprise cloud DAST — quote-based, often bundled with InsightVM and InsightIDR.
Industry-standard host/network vulnerability scanner — Essentials free for 16 IPs, Pro $3,590/yr.
Qualys VMDR
paidEnterprise VM platform with web app scanning add-on — quote-based, asset-priced.
Open-source vulnerability scanner descended from Nessus — free Community Edition, paid appliances for enterprise.
Template-driven fast scanner — community templates cover thousands of CVEs. Free CLI, paid managed cloud.
Long-running open-source web server scanner — checks 6,700+ dangerous files and outdated software.
Standard network discovery + port/service scanner — universal first step for any audit.
Open-source SIEM/XDR with file-integrity, vuln detection, compliance audit modules — also paid Wazuh Cloud.
Best-known WordPress/CMS malware scan + cleanup. Free SiteCheck, paid Platform from ~$199.99/yr per site.
WordPress endpoint security plugin — most installed WP firewall, paid Premium from $119/yr per site.
WordPress-specific vulnerability database + scanner — free CLI with optional API key.
WordPress + plugin CVE feed with virtual patching — paid plans from $5/site/mo.
Bundled-with-hosting malware monitor — published $9.99-$59.99/mo, often distributed via shared-hosting providers.
Malware scanner with shellcode detection — free one-time scan, paid monitor from $20/mo.
Free public TLS/SSL grading service — de-facto standard for cipher and config audit.
Free HTTP security header grader — checks CSP, HSTS, X-Frame-Options, cookies.
HackerOne
paidLargest bug bounty + VDP platform — quote-based, programs typically run $5K+/mo plus bounty pool.
Bugcrowd
paidCrowdsourced security platform — bug bounty, pen-test-as-a-service, attack surface mgmt. Quote-based.
Cobalt
paidPentest-as-a-Service — vetted human testers, fixed-scope packages. Quote-based, typical engagement ~$8,000+.
AI-assisted DAST with free starter tier — paid plans from $99/mo, popular with SMB SaaS.
DAST + dark-web monitoring + compliance reporting — free public tests, paid quote-based platform.
Bright Security
paidDeveloper-first DAST + API security with low false-positive claim — quote-based, formerly NeuraLegion.
FAQ
What is a website security audit?
A website security audit is a structured check of a website's public surface (HTTP, TLS, HTTP headers), application code (SAST), running app behavior (DAST), and infrastructure (network/host scanners) for known vulnerabilities, misconfigurations, and exposed secrets. The output is a prioritized list of issues with remediation steps.
DAST vs SAST vs SCA — what's the difference?
DAST (Dynamic) tests a running application by sending real HTTP requests — examples: OWASP ZAP, Burp, Detectify, Acunetix. SAST (Static) analyzes source code without running it — examples: Snyk Code, Checkmarx SAST, Veracode SAST. SCA (Software Composition Analysis) inspects third-party dependencies for known CVEs — examples: Snyk Open Source, Dependabot. Mature programs use all three.
Free vs paid — what changes?
Free open-source tools (OWASP ZAP, Nuclei, Nikto, OpenVAS, Wazuh, WPScan) are very capable but require setup, tuning, and ongoing maintenance. Paid SMB tiers ($89-$300/mo: Detectify, Probely, Intruder, Astra) add managed scanning, compliance reports, and Slack/Jira integrations. Enterprise tiers ($15K-$100K+/yr: Veracode, Checkmarx, Rapid7) add governance workflows, SAML, multi-team RBAC, and dedicated support.
How often should I run a security audit?
Continuous DAST on each release for production web apps. Full third-party pentest at least once per year (HackerOne / Bugcrowd / Cobalt) and after any major architecture change. SCA on every CI build. Network/host vuln scans (Nessus / OpenVAS) monthly for internal infrastructure.
What about WordPress sites specifically?
WordPress has its own ecosystem of plugin- and theme-level CVEs. Use Wordfence or Patchstack as endpoint protection, WPScan as a CLI vulnerability check, and Sucuri for malware cleanup. Generic DAST tools (ZAP, Detectify) still work but won't catch WP-specific plugin CVEs.
What does GuardLabs Web-Audit actually do — is it a vulnerability scanner?
No. Web-Audit Guardian watches the public web layer of one brand for content drift, multi-language redirect bugs, page truncation, broken sitemaps, and 30x loops every 30 minutes. It's complementary to a real DAST scanner, not a replacement. Best run alongside ZAP / Burp / Detectify, not instead of them.